Incandescent gas-lamp.



No. 783,109. PATENTED. FEB. 21, 1905.

H. M. H. DELAMARRE. INGANDESGENT GAS LAMP.

- APPLICATION FILED NOV. 10, 1903.

2 SHEETS-SHEET 1.

No. 783,109. PATENTED FEB. 21, 1905.

H. M. H. DELAMARRE'.

INGANDBSGENT GAS LAMP.

APIIIIOATION FILED NOV. 10, 1903.

2 SHEETS-SHEET 2.

Patented February 21, 1905.

PATENT FFICF;

HENRI HUBERT DELAMARRE. OF PARIS, FRANCE.

INCANDESCENTGAS-LAIVIP.

SPECIFICATION forming part of Letters Patent No. 783,109, dated'February 21, 1905.

Improvements in Incandescent Gas-Lamps, of

which the following is a specification.

In applying the incandescent system of gaslighting to railway and like vehicles it is essential that the interior of the lamp should be accessible for cleaning purposes from within the vehicle, for even the modern incandescent mantlecan ill withstand the manipulations incident to cleaning the lamp from outside the vehicle. On the other hand, it is important that the existing parts of the lanterns already in use in vehicles lighted by gas should be available in introducing the incandescent system.

By the present invention there is constructed an incandescent lamp which has a rigid burner for supporting the mantle, is easily accessible from within the vehicle, and can be placed in any existing lantern by substituting for the ordinary shade one of.smaller diameter fixed in a ring that turns on a hinge made in one piece with or fixed to th reflector which constitutes the upper part of the apparatus. The lamp is held in the existing lantern by lugs secured to the lantern-body in like manner as the lugs supporting the zinc ring which carries the shade in the normal lantern and by means of the same screws. Thus it is only necessary to remove the reflector and the shade from the lantern in use and to introduce instead the lamp about to-be de' scribed, fixing it by the means indicated, and to connect by a metal pipe the gas-cock with the bent pipe of the lantern.

In the accompanying drawings, Figure 1 is a vertical section through a lamp made according to this invention and adapted for an incandescent burner the mantle of which is in the usual vertical position. Fig. 2 is a like section of a modification in which the burner and mantle are in what may be called an inverted position. Fig. 3 illustrates the use ofanother form of inverted burner.

1n the arrangement shown in Fig. 1 the cast-iron body a of the reflector is in one piece Application filed November 10,1903. Serial No. 180,564.

with the chimney and has on its under surface a circular flange b, which. is provided at one part with the eyes 0 of a hinge by which the ring d for holding the glass 6 is attached and at another part with a device for locking the ring (Z by means of the key f against the pressure of the spring-pin f. This part of the lamp is introduced into the lantern like the ordinary reflector and is held in place by lugs g, riveted to the reflector and fixed to the body of the lantern by screws h, which serve in existing lanterns to hold the zinc ring for supporting the shade. In this arrangement it is necessary that the enameled surface of the reflector should be capable of being taken out without having to dismount the parts. For this purpose the reflecting parts of the reflector is a separate piece from the casting that forms the body a and may be stamped out of sheet metal. It is held in place by three conical-headed spring-pins whereof the points enter corresponding holes in the brim of the piece, so that the latter is easily removed. The casting a has a perforated lug 70. which constitutes the passage for the gas of the injector Z of. the Bunsen burner. A tubular part t, perforated at the top, is arranged in the chamber 7' to stop the dust or impurities which collect in the annular space. The curved pipe we conveys the mixture of gas and air made by the injector to the burner. The lamp has a cock at and a regulating-screw 0. Its chimney is surrounded by a hood p, in which the air is heated. As will be seen from the drawings, the gas is drawn from the existing main supply-pipe Q by substituting for the cock in which the latter generally terminates a union r. The mantle s is suspended from a vertical rod t, fixed in a double-walled socket u, which surrounds the head of the burner, the lower edge of the mantle being between the two walls of the socket. The latter protects the lower edge of the mantle and in case of rupture keeps it in its normal position pending the substitution of a new one. This arrangement allows another socketyw, having a fresh mantle in position, to be readily substituted for the one already in place.

In the modiiications shown in Figs. 2 and 3 the incandescent illumination is obtained by means of an inverted burner of any known or suitable construction and of a proper mantle attached thereto. Figs. 2 and 3 show two eX- amples. Here the injector Z is horizontally arranged in the space between the enameled reflector z' and the cast-iron body a of the reflector, so that it is protected as much as possible from the heat of the combustion. The

- injector can easily be cleaned after removing the screw s. The tube which passes from the injector is also protected by a suitable envelop.

All the parts of the lamp are easily accessible from the interior of the vehicle when the reflector i has been removed.

From the above description it will be seen that the invention has the advantage of being applicable for transforming, if desired, existing railway-lamps in order to introduce the incandescent system at a small cost.

Having thus explained my invention, what I claim is- 1. As an article of manufacture, an incandescent gas-lamp comprising an annular body a, a Bunsen burner and a mantle therefor stationary withinsaid body, a glass cup 6 and a supporting-ring cl therefor hinged to said body, a detachable reflector c suspended from said body, a chimney integral with said body and a gas-chamber is situated above said. reflector.

2. As an article of manufacture, an incandescent gas-lamp comprising an annular body a and a chimney integral therewith, a Bunsen burner and a mantle therefor stationary Within said body, a glass cup 6 and a supportingring therefor hinged to said body, a detachable reflector isuspended from said body, and a gas-chamber Z arranged above the reflector and provided with an internal tubular part 6.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 29th day of October, 1903.

HENRI MARIE HUBER'I DELAMARRE. WVitnesses:

AUGUSTUS E. INGRAM,

ALoIDE FABE. 

